Current Electricity

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  • Lectures 110
  • Contents Video: 6.5 hours
  • Skill Level All Levels
  • Languages English
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About This Course

Published 3/2015 English

Course Description

Definition: It is defined as the time rate of flow of charge through any cross section of a conductor.

Electric current = total charge flowing per time taken.

i = q / t .

OHM'S LAW:

It states that the current 'i' flowing through a conductor is directly proportional to the potential difference V across the ends of the conductor, provided physical conditions of the conductor such as temperature, mechanical strain etc. are kept constant.

Electric Current:

1 ampere of electric current is produced when 1 coulomb of electric charge passes through the cross-section of the conductor in 1 second.

RESISTANCE:resistance of a specimen of a material is the opposition offered by it to flow of current.

Definition: the resistance of a conductor is defined as the ratio of the potential difference V across the conductor to the current i flowing through the conductor.

Combination of resistors

Series combination:

Consider a number of resistors connected in series by joining them end to end such that same current passes through all the resistors.

Parallel combination:

Consider a number of resistors connected in parallel by joining one end at one point and other end at another point.

What are the requirements?

  • Students should know basic knowledge on current flow.

What am I going to get from this course?

  • From this course students can gain knowledge on Current electricity, Electrostatic potential and capacitance, Electric charges and fields.

What is the target audience?

  • Students studying in middle and upper classes.
  • Science students, teachers and lecturers.

What you get with this course?

Not for you? No problem.
30 day money back guarantee.

Forever yours.
Lifetime access.

Learn on the go.
Desktop, iOS and Android.

Get rewarded.
Certificate of completion.

Curriculum

Section 1: Electric charges and fields
Prerequisites
Preview
00:46
Learning objectives
Preview
00:48
Electric charges and fields - introduction
Preview
02:01
Conductors and insulators
Preview
02:44
Electric flux
Preview
05:58
Charging by induction
Preview
01:45
Basic properties of electric charges
05:24
Coulomb's law
04:45
Forces between multiple charges
03:59
Electric field
05:08
Electric field lines
03:59
Electric dipole
08:22
Dipole in a uniform external field
03:11
Electric field of a continuous charge distribution
04:14
Gauss's theorem
04:56
Application of gauss's theorem
09:23
Electric field lines
04:01
Summary
02:30
Electric charges and fields - level 1
5 questions
Electric charges and fields - level 2
5 questions
Section 2: Electrostatic potential and capacitance
Prerequisites
01:02
Learning objectives
00:55
Introduction
00:58
Electric potential
05:18
Potential due to a point charge
02:30
Potential due to an electric dipole
02:53
Potential due to a system of charges
02:25
Equipotential surfaces
03:11
Potential energy of system of charges
03:41
Potential energy in an external field
03:30
Electrostatics of conductors
01:34
Dielectrics and polarization
03:33
Capacitors and capacitance
01:44
The parallel plate capacitor
02:18
Effect of dielectric on capacitance
04:46
Combination of capacitors
04:26
Energy stored in capacitors
05:37
Van de graff generator
06:10
Summary
08:34
Electrostatic potential and capacitance - level 1
5 questions
Electrostatic potential and capacitance - level 2
5 questions
Section 3: Current electricity
Prerequisites
00:20
Learning objectives
00:59
Introduction
02:43
Electric current
04:14
Ohm's law
01:18
Resistance
02:27
Superconductors
03:19
Combination of resistor
04:02
Electrical cells
05:16
Grouping of cells
07:32
Kirchhoff rules
04:46
Wheatstone bridge
07:04
Metre bridge
02:06
Potentiometer
04:00
Temperature dependence of resistivity
03:04
Drift velocity
13:22
Summary
04:26
Current electricity - level 1
5 questions
Current electricity - level 2
5 questions
Section 4: Alternating current
Prerequisites
03:45
Learning objectives
01:00
Introduction
04:21
Instantaneous value of current (i)
05:27
R.M.S Value of ac
07:24
Power in ac circuit
05:38
AC Through a resistor
05:53
AC Voltage applied to an inductor
02:50
Inductive reactance
04:21
AC voltage applied to a capacitor
06:49
AC Voltage applied to a series lcr circuit
11:55
Resonant circuit
06:22
Importance of power factor
10:28
Lc oscillations a qualitative study
03:14
LC Oscillations lc circuit
04:04
Transformer
12:54
Summary
09:11
Alternating current - level 1
5 questions
Alternating current - level 2
5 questions
Section 5: Electricity
Prerequisites
00:35
Learning objectives
00:43
Introduction
01:05
Electric current and circuit
03:03
Electric potential and potential difference
02:04
Circuit diagram
01:04
Ohms law
02:55
Factors on which the resistance of a conductor depends
03:06
Resistance of a system of resistors
00:45
Resistors in series
02:37
Resistors in a parallel
02:15
Heating effect of electric current
03:21
Practical’s of heating effect
02:09
Electric power
01:51
Summary
02:33
Electricity - level 1
5 questions

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